The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 22, 2006
Filed:
May. 28, 2004
Abdelkrim Benchaib, Montigny le Bretonneux, FR;
Jean-luc Thomas, Fontainebleau, FR;
Serge Poullain, Arpajon, FR;
Jean-claude Alacoque, Communay, FR;
Abdelkrim Benchaib, Montigny le Bretonneux, FR;
Jean-Luc Thomas, Fontainebleau, FR;
Serge Poullain, Arpajon, FR;
Jean-Claude Alacoque, Communay, FR;
ALSTOM, Paris, FR;
Abstract
A method is described of regulating the instantaneous electromagnetic torque of a polyphase rotating electrical machine equipped with stator and/or rotor windings supplied by a voltage and a current generated by an inverter formed of switches whose switching is controllable. The method comprises a step of commanding the switching of the switches of the inverter using the fundamental frequency of the voltage generated by the inverter and a form of synchronous pulse width modulation configured as a function of an input set point, and a step of calculating the input set point from an instantaneous torque set point at each regulation time. The method further comprises a step of determining the time interval between two successive regulation times so that the time interval corresponds to an integer multiple of the period of oscillation of the instantaneous torque of the machine.